Run Selection and Exposure Determination for the Majorana Demonstrator

The  MAJORANA DEMONSTRATOR is an array of germanium detectors enriched in Ge-76 in order to search for neutrinoless double beta decay. The Demonstrator is surrounded by active and passive shielding operating in the Davis Campus on the 4850 ft level of the Sanford Underground Research Facility (SURF). Data taking with the enriched detectors ended in March 2021, while the array continues to operate with natural Ge detectors for background studies. Data produced by the MAJORANA DEMONSTRATOR is collected as runs up to 1 hour in length that are grouped together by run type and quality to form data sets for analysis. During the run selection process, an automatic run selection process examines each run against 15 quality attributes to provide a conservative ranking and create a good run list that defines the exposure available for analysis. An opportunity exists to revise the run selection criteria to potentially capture additional periods of time for usable data. This exercise will also inform data exclusion in future experiments. The run selection criteria and new exposure estimates for the full Majorana Demonstrator Ge-76 operational period will be presented.